Edwardo: The Horriblest Boy in the Whole Wide World by John Burningham

From the back of the book:
Edwards is an ordinary boy. He is also sometimes noisy, messy, clumsy, and cruel, and the grown-ups in his life aren't about to let him forget it. "You are the noisiest boy in the whole wide world," the tell him with wagging fingers. Their scolding at his every misstep, through, only serves to make Edwardo all the more noisy, messy, clumsy, and cruel, until it seems that he really might be the horriblet boy in the whole wide world.